| canal | | |
| n. | 1. canal | (astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion. |
| ~ astronomy, uranology | the branch of physics that studies celestial bodies and the universe as a whole. |
| ~ channel | a deep and relatively narrow body of water (as in a river or a harbor or a strait linking two larger bodies) that allows the best passage for vessels.; "the ship went aground in the channel" |
| n. | 2. canal, channel, duct, epithelial duct | a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance.; "the tear duct was obstructed"; "the alimentary canal"; "poison is released through a channel in the snake's fangs" |
| ~ pore | any small opening in the skin or outer surface of an animal. |
| ~ passageway, passage | a path or channel or duct through or along which something may pass.; "the nasal passages" |
| ~ canalis vertebralis, spinal canal, vertebral canal | the canal in successive vertebrae through which the spinal cord passes. |
| ~ ductule, ductulus | a very small duct. |
| ~ canaliculus | a small canal or duct as in some bones and parts of plants. |
| ~ canal of schlemm, schlemm's canal, sinus venosus sclerae | a circular canal in the eye that drains aqueous humor from the anterior chamber of the eye into the anterior ciliary veins. |
| ~ venous sinus, sinus | a wide channel containing blood; does not have the coating of an ordinary blood vessel. |
| ~ ampulla | the dilated portion of a canal or duct especially of the semicircular canals of the ear. |
| ~ lachrymal duct, lacrimal duct, tear duct | any of several small ducts that carry tears from the lacrimal glands. |
| ~ nasolacrimal duct | a duct that carries tears from the lacrimal sac to the nasal cavity. |
| ~ haversian canal | any of the many tiny canals that contain blood vessels and connective tissue and that form a network in bone. |
| ~ hepatic duct | the duct that drains bile from the liver. |
| ~ canalis inguinalis, inguinal canal | oblique passage through the lower abdominal wall; in males it is the passage through which the testes descend into the scrotum and it contains the spermatic cord; in females it transmits the round ligament of the uterus. |
| ~ bile duct, common bile duct | a duct formed by the hepatic and cystic ducts; opens into the duodenum. |
| ~ pancreatic duct | a duct connecting the pancreas with the intestine. |
| ~ lymph vessel, lymphatic vessel | a vascular duct that carries lymph which is eventually added to the venous blood circulation. |
| ~ salivary duct | a duct through which saliva passes from the salivary gland into the mouth. |
| ~ aqueductus cerebri, cerebral aqueduct, sylvian aqueduct | a canal connecting the third and fourth ventricles. |
| ~ ureter | either of a pair of thick-walled tubes that carry urine from the kidney to the urinary bladder. |
| ~ urethra | duct through which urine is discharged in most mammals and which serves as the male genital duct. |
| ~ canalis cervicis uteri, cervical canal | a spindle-shaped canal extending from the uterus to the vagina. |
| ~ umbilical, umbilical cord | membranous duct connecting the fetus with the placenta. |
| ~ vagina | the lower part of the female reproductive tract; a moist canal in female mammals extending from the labia minora to the uterus.; "the vagina receives the penis during coitus"; "the vagina is elastic enough to allow the passage of a fetus" |
| ~ epididymis | a convoluted tubule in each testis; carries sperm to vas deferens. |
| ~ ductus deferens, vas deferens | a duct that carries spermatozoa from the epididymis to the ejaculatory duct. |
| ~ seminal duct | the efferent duct of the testis in man. |
| ~ ejaculatory duct | a part of the seminal duct formed by the duct from the seminal vesicle and the vas deferens; passes through the prostate gland. |
| ~ cartilaginous tube | a duct with cartilaginous walls. |
| ~ bronchiole | any of the smallest bronchial ducts; ending in alveoli. |
| ~ alimentary canal, alimentary tract, digestive tract, digestive tube, gastrointestinal tract, gi tract | tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination. |
| ~ lactiferous duct | ducts of the mammary gland that carry milk to the nipple. |
| n. | 3. canal | long and narrow strip of water made for boats or for irrigation. |
| ~ caledonian canal | a canal in northern Scotland that links North Sea with the Atlantic Ocean; runs diagonally between Moray Firth at the northeastern end and Loch Linnhe at the southwestern end; now little used. |
| ~ caloosahatchee canal | a canal that connects Lake Okeechobee with the Caloosahatchee River in southern Florida to form part of the Cross-Florida Waterway. |
| ~ cut | a canal made by erosion or excavation. |
| ~ industrial watercourse | a canal that is operated by one or more industries. |
| ~ lock chamber, lock | enclosure consisting of a section of canal that can be closed to control the water level; used to raise or lower vessels that pass through it. |
| ~ lockage | a system of locks in a canal or waterway. |
| ~ raceway, race | a canal for a current of water. |
| ~ ship canal, shipway | a canal large enough for seagoing vessels. |
| ~ waterway, watercourse | a conduit through which water flows. |
| ~ grand canal | an inland waterway 1000 miles long in eastern China; extends from Tianjin in the north to Hangzhou in the south. |
| ~ grand canal | the major waterway in Venice, Italy. |
| ~ cape cod canal | a canal connecting Cape Cod Bay with Buzzards Bay. |
| ~ erie canal | an artificial waterway connecting the Hudson river at Albany with Lake Erie at Buffalo; built in the 19th century; now part of the New York State Barge Canal. |
| ~ new york state barge canal | a system of canals crossing New York State and connecting the Great Lakes with the Hudson River and Lake Champlain. |
| v. | 4. canal, canalise, canalize | provide (a city) with a canal. |
| ~ furnish, provide, supply, render | give something useful or necessary to.; "We provided the room with an electrical heater" |
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